Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A user equipment (UE), comprising: a receiving circuitry to receive indication information carried by narrowband physical downlink control channel (NPDCCH), which indicates the subcarriers of narrowband physical uplink shared channel (NPUSCH) assigned for UE, wherein when subcarrier spacing of NPUSCH is 3.75 kHz, the receiving circuitry uses the indication information to indicate one subcarrier from possible assigned subcarriers and when subcarrier spacing of NPUSCH is 15 kHz, the receiving circuitry uses the indication information to indicate a set of one or more allocated subcarrier(s) according to a predefined mapping table, wherein the table includes entries for single subcarrier's allocation and entries for multiple subcarriers' allocation, wherein the number of allocated subcarriers is 1, 3, 6 or 12.
Wireless communication. This invention addresses the efficient allocation of uplink resources in a user equipment (UE) for narrowband transmissions. Specifically, it concerns how a UE interprets control information to determine which uplink subcarriers it is assigned to use for transmitting data on the narrowband physical uplink shared channel (NPUSCH). The UE includes receiving circuitry that receives indication information. This information is transmitted on the narrowband physical downlink control channel (NPDCCH). The indication information specifies the subcarriers of the NPUSCH that are assigned to the UE. The interpretation of this indication information depends on the subcarrier spacing of the NPUSCH. When the NPUSCH subcarrier spacing is 3.75 kHz, the receiving circuitry uses the indication information to select a single subcarrier from a set of possible assigned subcarriers. When the NPUSCH subcarrier spacing is 15 kHz, the receiving circuitry uses the indication information to identify a set of one or more allocated subcarriers. This identification is performed by referencing a predefined mapping table. This table contains entries that map the indication information to either a single subcarrier allocation or a multiple subcarrier allocation. The number of subcarriers that can be allocated in this multi-subcarrier scenario is limited to 1, 3, 6, or 12.
2. A base station, comprising: a generation circuitry to generate indication information carried by narrowband physical downlink control channel (NPDCCH), which indicates the subcarriers of narrowband physical uplink shared channel (NPUSCH) assigned for UE, wherein when subcarrier spacing of NPUSCH is 3.75 kHz, the generation circuitry uses the indication information to indicate one subcarrier from possible assigned subcarriers and when subcarrier spacing of NPUSCH is 15 kHz, the generation circuitry uses the indication information to indicate a set of one or more allocated subcarrier(s) according to a predefined mapping table, wherein the table includes entries for single subcarrier's allocation and entries for multiple subcarriers' allocation, wherein the number of subcarriers is 1, 3, 6 or 12; and a transmission circuitry to transmit the indication information carried by NPDCCH.
This invention relates to wireless communication systems, specifically to a base station that efficiently assigns and indicates subcarrier resources for narrowband physical uplink shared channel (NPUSCH) transmissions to user equipment (UE). The problem addressed is the need for a flexible and efficient method to indicate subcarrier allocations for NPUSCH, particularly when different subcarrier spacings (3.75 kHz or 15 kHz) are used. The base station includes generation circuitry that creates indication information carried by narrowband physical downlink control channel (NPDCCH). This information specifies the subcarriers allocated for UE uplink transmissions. For NPUSCH with 3.75 kHz subcarrier spacing, the indication information directly points to a single subcarrier from the possible assigned subcarriers. For NPUSCH with 15 kHz subcarrier spacing, the indication information references a predefined mapping table that supports both single and multiple subcarrier allocations. The table includes entries for allocating 1, 3, 6, or 12 subcarriers, allowing flexible resource assignment. Transmission circuitry then sends the indication information via NPDCCH to the UE. This approach optimizes resource allocation signaling by adapting the indication method based on subcarrier spacing, reducing overhead while maintaining flexibility in subcarrier assignments.
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June 23, 2020
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